Compactness of Riesz transform commutator associated with Bessel operators

Compactness of Riesz transform commutator associated with Bessel operators
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与 Bessel 算子关联的 Riesz 变换换向器的紧致性

DOI:
10.1007/s11854-018-0048-5
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发表时间:
2018
影响因子:
1
通讯作者:
Yang Dongyong
Yang Dongyong
中科院分区:
数学2区
文献类型:
--
作者:
Xuan Thinh Duong;Li Ji;Mao Suzhen;Wu Huoxiong;Yang Dongyong

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设λ> 0,λ是R ~+:=(0,∞)上的Bessel算子.首先引入并得到CMO(R+,x2λdx)的一个等价刻画.利用这一等价刻画,并在Bessel条件下建立了Fréchet-Kolmogorov定理的一个新版本,进一步证明了函数b ∈ BMO(R+,x2λdx)在CMO(R+,x2 λdx)中的充要条件是Riesz变换交换子xxxx在Lp(R+,x2 λdx)上是紧的,其中allp∈(1,∞).
Letλ> 0 andbe the Bessel operator on R+:= (0,∞). We first introduce and obtain an equivalent characterization of CMO(R+,x2λdx). By this equivalent characterization and by establishing a new version of the Fréchet-Kolmogorov theorem in the Bessel setting, we further prove that a functionb∈ BMO(R+,x2λdx) is in CMO(R+,x2λdx) if and only if the Riesz transform commutator xxxx is compact onLp(R+,x2λdx) for allp∈ (1,∞).